In the statements regarding `P_(4)` molecule
I) The oxidation state is zero
II) The covalency is 4
  III) The `P-hat(P)` bond angle `60^(@)`
  The correct combination is

Options

A. Only III is correct
B. I & III are correct
C. All are correct
D. I and II are correct

Answer

To solve the question regarding the statements about the `P4` molecule, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement I:** The oxidation state is zero.

- In the `P4` molecule, phosphorus is in its elemental form. In elemental forms, the oxidation state of an element is always zero. Therefore, this statement is **correct**.

### Step 2: Analyze the second statement
**Statement II:** The covalency is 4.

- To determine the covalency, we need to look at the structure of the `P4` molecule. The `P4` molecule has a tetrahedral structure where each phosphorus atom is bonded to three other phosphorus atoms. Thus, the covalency of phosphorus in `P4` is 3, not 4. Therefore, this statement is **incorrect**.

### Step 3: Analyze the third statement
**Statement III:** The `P-P` bond angle is `60°`.

- The `P4` molecule has a tetrahedral geometry. In a tetrahedral structure, the bond angles are approximately `109.5°`. However, if we consider the angle between the bonds in a planar representation, the angle between the bonds can appear to be `60°` when viewed from certain angles. However, this statement is misleading because the actual bond angle in tetrahedral geometry is `109.5°`. Therefore, this statement is **incorrect**.

### Conclusion
Based on the analysis:
- Statement I is correct.
- Statement II is incorrect.
- Statement III is incorrect.

Thus, the correct combination of statements regarding the `P4` molecule is **only Statement I**.

### Final Answer:
The correct combination is **I only**.

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